Genus Naranjia gen. nov.

Type species Salinator cf. swatowensis Yen, 1939 (Hong Kong form).

Etymology: Derived from narangi (Hindi—orange), referring to the brownish-orange colour of the shell.

Diagnosis: Shell diameter to 7 mm, fragile, brownish-orange, smooth; last whorl inflated, sometimes with spiral ridge on rounded shoulder, spire short; umbilicus intermediate width, lacking umbilical fold; aperture with flattened, indented sinus. Operculum thin, corneous, pale yellow with eccentric, paucispiral nucleus, inner surface lacking elaboration around nucleus. Head unpigmented in formalin-preserved specimens. Mantle cavity with opposed ciliary tracts restricted to exhalant canal; hypobranchial gland containing large, mucus-filled, chambers. Radula with central tooth, single lateral tooth, approximately 25 marginal teeth on each side of radula; central tooth with 13–17 cusps, mesocone enlarged, adjacent cusps bearing numerous smaller cusps, other cusps decreasing in length towards outer edge of tooth; lateral teeth with u-shaped gap between innermost and adjacent cusps; marginal teeth elongate, narrow. Central nervous system euthyneurous, cerebral and pleural ganglia fused; presence of subcerebral and parapedal commissures not confirmed; visceral loop concentrated, parietal ganglia positioned asymmetrically, accessory ganglion lacking. Seminal vesicle diverticulum from upper hermaphrodite duct, seminal receptacle black pigmented. Spermovipositor folded across aperture of spermoviduct, with half-spiral plate fused to distal spermovipositor sheath; numerous long, finger-shaped papillae covering distal spermovipositor. Spermovipositor sheath with enlarged pocket on left of spermovipositor, forming ‘accessory bursa’ with narrow aperture. Prostatic gland blind-ending, tubular, uniform for entire length. Egg mass unknown.

Remarks: The type species of this genus is intended to be the Hong Kong taxon described below, not Salinator swatowensis Yen 1939, if it proves to be distinct. Salinator swatowensis was originally included in Salinator based on shell characters (Yen 1939). However, anatomically, the Hong Kong material attributed to N. cf. swatowensis is clearly separable from species of Salinator . The central and lateral radular teeth are distinctive and the spermovipositor is folded and bears long, unchitinised papillae. The spermovipositor sheath has a unique enlarged pocket and the hypobranchial gland has large mucus chambers which are not present in Salinator .